Outotec (Finland) Oy

Outotec Oyj

Gunnar Berg

Jochen Güntner

Peter Sturm

Jörg Hammerschmidt

Maciej Wrobel

Åke Holmström

Karin Lundholm

Ake Holmström

Mikhail Maliarik

Bert Ögren

Ake Holmstrom

A method for the treatment of flue dusts containing arsenic and/or antimony from pyrometallurgical methods, wherein a reducing agent is added to the flue dusts, the flue dusts are heated together with the reducing agent, and volatile components are separated from a slag. The reducing agent is a carbonaceous compound.

Method and plant for removing arsenic and/or antimony from flue dusts

The present invention relates to a method of treating lead anode slime having high fluorine and arsenic content, in particular to a method comprising smelting of the lead anode slime and cleaning the produced off gases in a one or more wet gas cleaning stages.

Method for treating lead anode slime

A process and a plant for treating ore concentrate particles containing valuable metal and having at least arsenic and sulfur containing components. The process comprises a two-stage roasting process comprising a first roasting step and a second roasting step. A gas mixture is formed from the first process gas component obtained from the first roasting step and from the second process gas component obtained from the second roasting step. Post combustion of the gas mixture is made in a post combustion chamber that uses the sulphide rich first process gas component and the second process gas component as oxidizer gas in order to decompose SOin the gas mixture. The exit gas is exposed to subsequent gas cooling and dust removal steps.

Process and plant for treating ore concentrate particles containing valuable metal

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Skellefteå, Sweden

Gunnar Berg